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KV331 Audio was founded in 2012 by a dedicated team of engineers, musicians, and sound designers with the sole purpose of providing high-quality virtual instruments for musicians globally. Its flagship soft synth, SynthMaster, has over 24,000 licensed users in over 110 countries and received numerous awards from prestigious music technology publications around the world; while walking away from MusicTech Magazine's 2016 Gear Of The Year awards as a Gold Award Winner in the 'Best Software Instrument/Sample Library' category, MusicRadar readers recently ranked it number one in their '50 best VST/AU plugin synths in the world today' survey.

Products by KV331 Audio

Latest reviews of KV331 Audio products

SynthMaster 2
Reviewed By Faydit
April 27th, 2022

One of the best sounding and most flexible synthesizer plugins, which I know.

Almost too many features, but of course you do not need to use them all, alone the existing presets sound very good. I've also bought some more vintage based expansions, which also up to now did not disappoint me.

More than fair price for the quality and features.

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SynthMaster 2
Reviewed By vata44
November 3rd, 2021

I absolutely love this synth. I am always drawn to it when looking for a sound or to design a sound. I love the layout, sound, and flexibility. It is quite deep. It allows .WAV file imports, but the only thing is it missing imo is a rompler library with a real Piano and Strings. I know this isn't the aim of the product so I am not disappointed, but if they added this in the future it might be the only thing I ever used.

I think the effects section is great as well, the only thing I would hope for is a ValhallaShimmer-esque reverb.

I like that you can use the Synth as an FX unit as well, but it would be helpful if they had a different GUI for the FX only version. I understand that would probably be a tremendous amount of work, but it would really set it apart and make the FX version less cluttered and more usable.

If you want to buy a virtual synth, I would put this HIGH on my list. I own Diva, Zebra, Lush 101, Korg, and the whole NI suite, but I always come back to Synthmaster and Synthmaster One.

Response from kv331 from KV331 Audio on November 4th, 2021

Hi there, thank you very much for encouraging words! Don't forget to download our latest v2.9.10 update, it has a serious usability improvements, critical bug fixes, and new content (factory presets and skins), and it is the most stable version to date.

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SynthMaster 2
Reviewed By Triplefox
August 26th, 2021

I just upgraded from Synthmaster One + Synthmaster Player to the Everything bundle and have had the prior two for some years and often bring them out.

Synthmaster is a true "jack of all trades, oftentimes better than master of one". It's established and stable, and its utility as a preset box is enormous, even before getting the expansions. I readily admit to rarely deep-diving the UI, because, while I've been toying with filters and envelopes for 20 years at this point, the presets basically always have something I want. The licensing is, relative to the scale of the product, very hassle-free, unlike most of the big players in plugins. Not only does it have presets, but it also has macro knobs for each preset, so no extra configuration step is needed to get some expressive playing. These are all qualities that are boring yet important when one's attention moves away from noodling and towards quickly producing tracks. Synthmaster plus your multisample rompler library of choice is a fine instrument palette, and anything on top is getting into extra-credit territory and is relatively less important than the studio recording work and effects plugins in making a well-rounded production.

The sound quality is something I've sometimes dinged Synthmaster for and it did keep me away in the past - in a head-to-head demo it's just a little more polite and thin than competitors, on average - but it has only gotten better with time and it's always had a lot of tweakability, and it successfully avoids the trap of glossy over-effected presets that you have to immediately strip down to their bare bones to actually use. For the most part, you can bring quality up to par by cranking the engine quality and doing a little more mixing work to give it some distortion, EQ, transient punch or a touch of reverb. It's just not quite on the level of the high-end analog modellers when doing exposed, filter-intensive patches(yet), and that's the kind of thing that, if it really does concern you that much, you may just want to get real analog gear instead.

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SynthMaster 2
Reviewed By ksertb@hotmail.com
August 3rd, 2021

It is amazing! It can do almost each and every synthesis (hence the name Synthmaster) and the workflow is great. Just try to imagine the sound you want and simply count on Synthmaster. %99 you get the sound you like with high quality.

It also comes with so many presets, more than you can imagine.

Bear in mind that it very affordable in the competition. So please check it out. You will not regret it.

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SynthMaster One
Reviewed By seangm
March 29th, 2021

This synth doesn't work for me in Cubase, all my other plugins are working fine. The thing that pisses me off is I've tried multiple times over several months to contact support including the KVR Synthmaster forum and I've never heard back from their support. I see other people on their forum saying the get no response from support also. They seem to be actively putting out updates but just ignoring any issues reported by users. So I'm stuck with a synth I paid for but can't use, kind of sucks. I can't recommend this company in any way because of the way they ignore their users. Can I give zero stars please?

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SynthMaster One
Reviewed By osmancigil
January 19th, 2021

Even though I'm not an EDM producer or anything like that, I love trying virtual synths and see what might fit my own audio work.

Luckily, I got myself SynthMaster One version and using it on a Windows 10 LTSB, i7 4710MQ CPU with 16GB RAM. Before I got it, I had some crackling noises and stutters on my system when using real-time processing plugins with the lowest latency possible @48 samples.

Upgrading to 16GB of RAM and also updating my GPU drivers did really help with other plugins and VSTis as well as SynhtMaster ONE. I almost had no crackling or stuttering when playing with it.

For people like creating mind-blowing sounds with synths may take a lot of time. But SynthMaster ONE comes with around 1200 something highly impressive presets.

My first impression was like it's so huge. Almost every preset sounds like it's going to dominate the sonic canvas and really gives me chills every time.

I definitely recommend anyone getting yourself a copy instead of downloading cracked software. It's very affordable and high quality in terms of sounds and tones that one can generate with this synth.

Here's a preset walkthrough that I have made with SynthMaster ONE. Including my 250 something favourite presets. Excellent job KV331! Deserves every penny :).

SynthMaster ONE Demo

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SynthMaster 2
Reviewed By Duncle22
July 21st, 2020

Great sound and its easy to program. Although its an older synth its still one of the very best.

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SynthMaster 2
Reviewed By godly
September 26th, 2019

kv331audio promises it will deliver for version 3.0 a sample editor, wavetable editor and tons of acoustic content. This synth will be killer.

I got the synth for more than a year but just started working with it since i discovered it has sample and sfz import. I like the arp section and that it's CPU lightweight. Getting to like it allot.

What can improve the synth even more?

- a preset compare function (save in a temp when using SHIFT on the save button?)
- preset save without dialog (check the Pianoteq Preset save function, it's super)
- preset recall for a whole set on the FX (see avenger)
- more predefined preset settings, arp and fx. (also sync onine?)
- next/prev preset possibility to assign a cc to it
- put the 8 presets macros on top all the time !
- open the prest browser when left clicking the preset name (right click stays the same)

- 8 layers with mute/solo buttons
- keyboard zones
- audio level meters ! (also signal flow meters on the OSC/filters/ADSR

- drum specific OSC with 1 octave where you can add your single shot samples

- gain level on the osc (samples)
- a simple sample editor will be most welcome. (attack, end, loop, x-fade)

I'd love to see SM as a complete workstation, with keysplit, zones, drums, so we can create 1 key presets.

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Timeline of Latest Product Changes [view all]

Latest News from KV331 Audio

Latest Videos from KV331 Audio

Latest Forum Posts in the KV331 Audio forum @ KVR

Synthmaster one crashes Reaper
by Gercek_KV331 at 24 Jun 2022, 03:19
iOS SM2 Update v1.0.11 Problem!
by multicube at 23 Jun 2022, 17:07
Synthmaster 3
by Aliens at 21 Jun 2022, 14:19
Velltone - Evolution for Synthmaster One
by VELLTONE MUSIC at 20 Jun 2022, 11:55
Synthmaster not restoring settings?
by kv331 at 1 Jun 2022, 08:27
SynthMaster 2 update v2.9.14
by Living Room Rocker at 27 May 2022, 20:20
SynthMaster 2.9.13 reversion 12662 update?
by mabian at 27 May 2022, 05:44
SynthMaster One VST3 on the way pretty soon!
by Trensharo at 23 May 2022, 08:32
How to relocate Synthmaster\Resources folder
by gerryp650 at 17 May 2022, 07:20
Synthmaster 2.9.11 iOS crashes all the time!
by Sleepwalker at 9 May 2022, 07:19
Older versions
by kv331 at 30 Apr 2022, 12:05
Is Digital HP 24dB filter broken?
by kv331 at 24 Apr 2022, 13:02
Synthmaster 2 Midi won’t Learn!
by multicube at 24 Apr 2022, 05:28
Synthmaster Crash
by mjhazdra@comcast.net at 3 Apr 2022, 12:18